Insulator-support.



No. 687,230. Patented Nov. 26, mm.

T. E. HALLETT.

INSULATOR SUPPORT. (Application filed Sept. '7I 1901.)

' (No Model.)

Jazz 1 UNITED STATES PATENT OFFICE:

THOMAS E. I-IALLETT, OF CHICAGO, ILLINOIS.

'lNSULATOR-SUPPORT.

SPECIFICATION forming part of Letters Patent No. 687,230, dated November 26, 1901.

Application filed September 7, 1901- Serial No. 74,623. (No model.)

To aZZ whom it may concern/.-

Be it known that I, THOMAS E. HALLETT, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Insulator-Supports, (Case No. 1,) of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to insulator-supports for use in connection with insulators composed of glass or other suitable insulating material provided with threaded axial bores. These insulators in the past have been mounted upon threaded pins composed of Wood or iron. Metal insulator-supports are preferred in practice; but it isdiflicult to so construct the same as to compensate for the different coefficients of expansion possessed by the insulator and the metal. Among the suggestions for constructing a suitable form of metal support is one looking toward the construction of the support in the form of a split sleeve molded out of cast-iron, the base portion of the sleeve being integrally formed with a bracket-arm. This construction is not altogether suited to the purpose for reasons which are obvious. In the first place, the sleeve has to be made of such thickness as to strongly resist compression by the split portions thereof when the insulator is contracted during cold weather. The base portion of the sleeve in no wise can be contracted, as this part of the sleeve is continuous and solid, the sleeve being closed at this end. It is desirable, therefore, to provide a' metal support that will accommodate itself to the changes in the size of the opening in the insulator, due to variation in temperature, entirely throughout the length of the bore. To this end I have constructed an insulator formed of thin metal, preferably thin sheet steel, divided longitudinally by two slots diametrically opposite and united with the post or arm, each section of the sleeve being united to the arm or support bya thin flexible portion, whereby the base of the threaded support may be adj usted to compensate for variation in size of the insulatonbore as well as the remaining pertions of the support. Tongues are preferably provided at the upper end of the sleeve,

one upon each section thereof, while the support is preferably continued through the sleeve and engages the tongues, the tongues acting as distance-pieces to prevent the collapse of the sleeve, while at the same time they yield sufficiently to permit the sleeve to be contracted. The sleeve is preferably formed in distinct half-sections, these halfsections being fastened to the support, which is preferably a bar of iron rectangular in cross-section, the flexible lower ends of each sleeve-section being the preferred means by which the sleeve is mounted upon the arm or post.

I will explain my invention more fully by reference to the accompanying drawings, in which Figure l is a side elevation of a support constructed in accordance with myinvention, an insulator being indicated thereon in vertical section. Fig. 2 is a view at right angles to Fig. 1. Fig. 3 is a top view of the support. Fig. e is a sectional view on line 4 4 of Fig. 3.

Like parts are indicated by similar characters of reference throughout the figures.

The sleeve is formed in half-sections a a of the desired contour and preferably so shaped as to impart a slight'taper to the sleeve to fit the bore of the insulator, which tapers from the bottom toward the top. The threads and other features of the'sleeve construction are preferably formed by stamping each section out of thin sheet-steel. Each half-section is provided with a sloping downwardly and inwardly projecting base portion b, which preferably does not extend completely around each half-section, but which only occupies, say, a half of the contour of each half-section, whereby this base portion or tongue is made resilient. Each tongue is preferably provided with a pair of side walls to act as guides in locating the sleeve-sections upon their-support 0, which is preferably rectangular in cross-section, and at the same time to prevent the rotation of the sleeve upon the said support where but one rivet eis employed, the rivet passing through both the tongues 12 and the support 0 interposed between the same. These tongues 12 b are a new form of mounting and obviously constitute a very useful departure from the type of insulator of the prior art hereinbefore particularly re- ICO ferred to. At the upper end of each sleevesection there is provided a second tongue f, projecting from the middle portion of each sleeve-section. These upper tongues preferably occupy, say, a third of the periphery of each sleeve-section. The support is projected through the sleeve and is engaged by the tongues f, which act as distance-pieces to preserve the proper relation between the sleeve-sections, the support being so proportioned with respect to the tongues I) Z) and ff as to provide a space or slot upon each side of the sleeve, these slots being diametrically opposed, so that upon a contraction of the insulator the sleeve-sections may be permitted to approach, the said tongue being sufficiently resilient to cause the sleeve-sections to separate when the insulator expands, so that a tight fit may be constantly maintained between the insulator and its support.

In order to permit the tongues b b and ff to readily perform their functions, I locate the same in planes oblique to the supportingbar 0, for if they were disposed in planes altogether at right angles to the said bar they would not readily yield to compression, as the metal, while thin,is preferably of such thickness as would prevent the compression or mutual approach of the sleeve-sections if these tongues were at right angles. I do not Wish to be limited, however, to the precise disposition made of the tongues.

I believe it to be-broadly new with me to provide an insulator-support formed into sections in combination with a yielding and resilient device for maintaining the sections of the support in a separated relation,permitting the sections of the support to approach upon a contraction of the insulator.

It is obvious that changes may readily be made from the preferred embodiment of my invention herein shown and particularly described, and I do not, therefore, wish to be limited to the precise disclosure herein set forth; but,

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A support for insulators, composed of metal shaped in the form of a threaded sleeve divided into sections, each sleeve-section being provided with a resilient connection for attachment with an arm or post, substantially as described.

2. In a support for insulators, the combination with a threaded metal sleeve divided into sections, to afford space between the sections of the sleeve and thereby permit relative movement between the sleeve-sections of a post, and resilient connections at the base of the sleeve, one between each sleeve-section and the post, substantially as described.

3. In a support for insulators, the combination with a threaded metal sleeve divided into sections, to aiford space between the sections of the sleeve and thereby permit relative movement between the sleeve-sections, of a post and. resilient connections, one between each sleeve-section and the post, substantially as described.

l. In a support for insulators, the combination with two threaded sleeve-sections, of resilient tongues projecting from the sleevesections obliquely and inwardly, and an arm to which the said tongues are secured, substantially as described.

5. In a support for insulators, the combination with two threaded sleeve-sections, of resilient tongues projecting from the sleevesections obliquely and inwardly, an arm to which the said tongues are secured, the said arm passing through the sleeve, and additional tongues interposed between the sleevesections and the said arm acting as distancepieces to maintain the sleeve-sections in their proper relation and at the same time permit the same to approach each other upon a contraction of the insulator, substantially as described.

6. In a support for insulators, the combination with a threaded sleeve divided into sections, of tongues for maintaining a separated relation betwcen the sleeve-sections and to permit the approach of the sleeve-sections upon a contraction of the insulator, substantially as described.

7. In a support for insulators, the combination with two threaded sleeve-sections, of resilient tongues projecting from the sleevesections obliquely and inwardly, an arm to which the said tongues are secured, and additional tongues for maintaining the sleevesections in a separated relation and at the same time permit the approach thereof upon a contraction of the insulator, substantially as described.

8. The combination with a support for insulators formed into sections, of a yielding and resilient distance-preserving device interposed between the sections of the support, substantially as described.

In witness whereof I hereunto subscribe my name this 31st day of July, A. D. 1901.

THOMAS E. IIALLET'I.

Witnesses:

GEORGE L. CRAGG, H. F. OBERGFELL. 

